This section is from interchange with Azadegan Expressway and Hemmat Expressway in northwestern Tehran city (Municipality District 21) to Doab, Shahrestanak, Alborz Province.

[4] Section 2 is from Doab, Shahrestanak, Alborz to Pol-e Zanguleh, Kelardasht District, Mazandaran Province.

The longest tunnel is Alborz Tunnel with a length of 6378 m.[4] Section 3 is from Pol-e Zanguleh, Kelardasht District, Mazandaran Province to Marzan Abad, Kelardasht District, Mazandaran Province with a length of 46 km.

[5] Section 4 is from Marzan Abad, Kelardasht District, Mazandaran Province to Chalus.

It has 4 tunnels with an overall length of 1400 m.[4] This section was opened in March 2013.